Windshield defroster blade



c l the main aim of such devices. It greatly retards ciably, under the heat to which it will be subject- 15 "30 In order to moreclearly disclose the'construc- `manner desired In the instance ShOWnktheY 80` Pfeled'iefef le# A, 2,100,019@

.l "2,1'ooQo19r-i'" i minutoSTER'lminaM "A1-lig Rolland'Wilsonn'Chicagc nl# "f I," ,L 'fiipplieaiefnguss' 1v, 19st,A separare; ,passate l 31 claims. (ciels-+1 .The irivenuentef-behereinafter described `re-y ieting memberr. `This. plateproviiies,e;suitablel 4meeste windshieid'defrester blades.`

, backing or baseto whichissecured inxanyfsuit- There arey agreat variety.- of `indsl'iield wipers i able manner a fabricltube, preferably of strong, of the oscillatingbladetype and a considerable` `wear `resistant canvas.` Thisy formsan open'- 5 number of thesehavebeen providedwith heating ended pocket orretainer.` Or the lowerendmay 5 elements in .one rmuinei".lor..another.A [Most l0f becIOSeCi.` if fleslle'li` Beth @lids may be closed.` 4 them have a rubber edge or surface arranged to',v iLprreferably, one mayA be readilyy opened.y 4This; engage andwipe the glass.n A defect in such a'rsheath,tubeorpocket maybecementedor otherrangements" is 'the""effect of heat on rubber. Wise secured, in 'any one of` a number of well l0 The rubber hardens and becomes short-lived. known ways, to thevplate I. It is designed and 10 In its hardened state it is less effective. A very intended to contact and wipe the windshieldrand serious objectionis that the rubber is an effective K to enclose and contain a heater. It must, therey f heat insulator. Consequently, rubber prevents or 1 fore, be wear resistant and a fairly good heat con- I seriously retards and lessens accomplishment of ductor. It should, also not deteriorate, appreor even prevents ow of heat from the heating ed. It may be treated, if desired, to render it element to the glass surface. i appreciably fire resistant. It may be treated,` The main objects of the present invention are too, to render itsubstantially waterproof.'` A good to provide a simple, efficient, compact and ingrade of canvashas been found very satisfactory. expensive defroster bladeavoiding'the above and Within thisA tube 0r pocket is slipped an enclcsed 20./

other defects, rand with which is associated a heating element. 4 Which. in turn, is enclosed in simple, efficient.' compact` temperature control the usualiibre or other tube 5. Thus, the heater` means, preventing `overheating while, nevertheis in direct contact with the canvas and with less, permitting considerable range of varying the metal back Dlete-` The heating element.4 temperatures. f per se, is well known. Itis such as are used in 25 An important object is the `use of readily ob- Various types 0f lighters, ete end, therefore. ltainable materials of high eillciency andlow cost needs no further description 0r illustration.v Its and, of a nature readilyy available throughout the terminals may be et. and lead out through. the entire country. "center, or at either end, or arrangedin any other tion, operation and use of theV invention, referare at the center and are, there, Connected t0 the ence should be had to the accompanying drawusual circuit wires 6 which are led in through ing forming part of this application. y an opening in plate I. 'Ihese wires, of course, Throughout the several figures of the drawinclude the, 1511811 bettery'end, f0i` Varying the ing, like reference characters designate the same tempelfetul'e 0f the device, e Variable `resistance 35 parts-.Hin the different views, device which may take the form of a rheostat 1. yIn the drawing: y l By operating the control of the rheostat, or its Fig. 1 is a. side elevation of theinvention switch or handle. the user may increase o'r deappned, the windshield glass lbeing shown in vercrease the temperature at will, according to con-- 40 tical cross section, and 'f f ditions. In this way, excessive and damaging 40 Fig. 2 is an enlarged lateral cross section on line heet. under -mild Cc'nditicns. iS vcidable, while i 2-2 of Fig, 1, looking in the direction of the ample heat is available for severe conditions, as arrows. I will be clearly understood.

Throughout this application, the term blade isv There is no heat insulation between the heater i used,broadly and in the 'sense generally accepted elementand the windshield. nor between the y4.5

and understood as applied to windshield vvipers` heater element and ,the parts 0f. the deflcstei,4 i i. e. the `movable arm which reciprocates across blade. The metal plete et the beck, acts as 8l the windshield` and', .by contact ilierewii-,l-g,` reradiator to reflect heat toward the windshield and moves accumulating moisture, snow, sleet,` etc. t0 confine it, tcecel'teln extent, between the 5o It is often referred to as the windshield wiper windshield and plateV l. Any freezing between 5.0 blade, Y glass and wiper vblade is practically impossible. g

Referring to `the drawing in detail l indicates It is equally impossible fOr the blade t0 become f a flat metal plate provldedfwith a small bracket .,ceeted..V clogged 0I" encased With snow.` ice. etcor the like for-removably` connecting it, in well lEvery part of its surface 1s maintained at such 5I known manner lto the free end of the usual oscila .temperature that it 4is `always clear. If the '56 ing from the field of the invention and it is meant to includeV all such within this applicai tion, wherein only one preferred form has been illustrated, purely by way of exampleand with no thought of in any degree limiting the claims thereby.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:-

1. A windshield defroster blade comprising a heat reflecting plate adapted to beconnected to the movable element of a windshield wiper, a

lfabric pocket carried by "said plate and extending therefrom vinto windshield-wiping position, and a heating element removably disposed within said pocket and in contact with said plate and said pocket, l l

2. A windshield defroster blade comprising a heat reflecting plate adapted to be connected to the movable 'element of a windshield wiper, a

fabric strip secured to opposite edges of said plate for substantially the full length thereof and extending outwardly therefrom forming a pocket the full length of said plate having a metal heat reflecting wall and an opposite fab-ric windshield wiping wall, and a heating element removablyv seated in said pocket in contact with said plate and said fabric, the heat of said element being applied both directly by contact to said fabric and indirectly by reflection by said plate to said fabric.` L,

.3.1L windshield defroster blade comprising a vheat reflecting plate adapted to be connected to the movable element. of a windshield wiper, a fabric strip secured to opposite edges of said plate for substantially full length thereof by folding over the edges of said plate and clamping the fabric between said folds and plate, said fabric strip extending outwardly from said plate and forming a pocket the full length of said plate having a metal heat reflecting wall and an opposite Yfabric windshield wiping wall, and a heating element removably seated in said pocket in contact with said plate and said fabric and between the edges of said fabric, the heatof saidV `element being applied both directly by contact to said fabric and indirectly by reflection by said plate.

Anus RQLLAND wnsoN. 

